Which type of installation is prohibited for mufflers?

Mufflers, which are typically used to reduce noise from exhaust systems, are prohibited for high pressure boilers primarily due to safety and operational concerns. High pressure boilers operate under significant steam pressure, and any modifications or additions, such as mufflers, can introduce potential failure points or complicate maintenance procedures.

In the context of high pressure boilers, the presence of a muffler could inhibit proper venting or lead to conditions that might affect the safety interlocks. These boilers require strict adherence to codes and standards to ensure that emissions and noise are managed through specific, approved methods that do not compromise the system’s integrity or safety. The use of mufflers could also lead to back pressure issues, which can endanger the boiler's operational capabilities and lead to dangerous conditions.

Therefore, regulations clearly outline the appropriate technologies and configurations that can be utilized, explicitly excluding mufflers in high pressure boiler installations to ensure that safety and performance are maintained at all times.